ST1S09_08 datasheet, PDF - EEWORLD Datasheet

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ST1S09_08: Description2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectificationtm; File Size377KB，18 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/

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2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectificationtm

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ST1S09

2 A, 1.5 MHz PWM step-down switching regulator

with synchronous rectification

Features

■

1.5 MHz fixed frequency PWM with current

control mode

2 A output current capability

Typical efficiency: > 90%

2 % DC output voltage tolerance

Two versions available: power good or inhibit

Integrated output over-voltage protection

Non switching quiescent current: (typ) 1.5 mA

over temperature range

DSON

(typ) 100 mΩ

Utilizes tiny capacitors and inductors

Operating junction temp. -30 °C to 125 °C

Available in DFN6 (3x3 mm) exposed pad

Moreover, since the required synchronous

rectifier is integrated, the number of the external

components is reduced to minimum: a resistor

divider, an inductor and two capacitors. The

power good function continuously monitors the

output voltage. An open drain power good flag is

released when the output voltage is within

regulation. In addition, a low output ripple is

guaranteed by the current mode PWM topology

and by the use of low E.S.R. SMD ceramic

capacitors. The device is thermally protected and

the output current limited to prevent damages due

to accidental short circuit. The ST1S09 is

available in the DFN6 3x3 mm package.

DFN6 (3x3mm)

Description

The ST1S09 is a step-down DC-DC converter

optimized for powering low output voltage

applications. It supplies a current in excess of 2 A

over an input voltage range from 2.7 V to 6 V.

A high PWM switching frequency (1.5 MHz)

allows the use of tiny surface-mount components.

Table 1.

Device summary

Order codes

ST1S09PU

ST1S09APU

(1)

ST1S09IPU

Packaging

ST1S09PUR

ST1S09APUR

ST1S09IPUR

Package

DFN6D (3x3 mm)

1. Available on request.

January 2008

Rev 3

1/18

www.st.com

ST1S09_08 Related Products

	ST1S09_08	ST1S09APU	ST1S09IPU	ST1S09PU
Description	2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectificationtm	2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectificationtm	2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectificationtm	2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectificationtm
Is it lead-free?	-	Lead free	Lead free	Lead free
Is it Rohs certified?	-	conform to	conform to	conform to
Maker	-	STMicroelectronics	STMicroelectronics	STMicroelectronics
Parts packaging code	-	DFN	DFN	DFN
package instruction	-	HVSON, SOLCC6,.11,37	HVSON, SOLCC6,.11,37	HVSON, SOLCC6,.11,37
Contacts	-	6	6	6
Reach Compliance Code	-	compli	compli	compli
ECCN code	-	EAR99	EAR99	EAR99
Analog Integrated Circuits - Other Types	-	SWITCHING REGULATOR	SWITCHING REGULATOR	SWITCHING REGULATOR
control mode	-	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE
Control Technology	-	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION
Maximum input voltage	-	6 V	6 V	6 V
Minimum input voltage	-	2.7 V	2.7 V	2.7 V
Nominal input voltage	-	5 V	5 V	5 V
JESD-30 code	-	S-XDSO-N6	S-XDSO-N6	S-XDSO-N6
JESD-609 code	-	e3/e4	e3/e4	e3/e4
length	-	3 mm	3 mm	3 mm
Number of functions	-	1	1	1
Number of terminals	-	6	6	6
Maximum output current	-	3.5 A	3.5 A	3.5 A
Package body material	-	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
encapsulated code	-	HVSON	HVSON	HVSON
Encapsulate equivalent code	-	SOLCC6,.11,37	SOLCC6,.11,37	SOLCC6,.11,37
Package shape	-	SQUARE	SQUARE	SQUARE
Package form	-	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	-	260	260	260
Certification status	-	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	-	1 mm	1 mm	1 mm
surface mount	-	YES	YES	YES
Switch configuration	-	BUCK	BUCK	BUCK
Maximum switching frequency	-	1800 kHz	1800 kHz	1800 kHz
Terminal surface	-	TIN/NICKEL PALLADIUM GOLD	TIN/NICKEL PALLADIUM GOLD	TIN/NICKEL PALLADIUM GOLD
Terminal form	-	NO LEAD	NO LEAD	NO LEAD
Terminal pitch	-	0.95 mm	0.95 mm	0.95 mm
Terminal location	-	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	-	40	40	40
width	-	3 mm	3 mm	3 mm

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